Rotation control device for working machine

a technology of rotating control device and working machine, which is applied in the direction of electric/magnetic computing, analogue processes for specific applications, instruments, etc., can solve the problems of radical slowdown of acceleration, bad operability, and inability to obtain a move or sense of the “slowdown of acceleration”. , to achieve the effect of improving operability

a technology of rotating control device and working machine, which is applied in the direction of electric/magnetic computing, analogue processes for specific applications, instruments, etc., can solve the problems of radical slowdown of acceleration, bad operability, and inability to obtain a move or sense of the “slowdown of acceleration”. , to achieve the effect of improving operability

US20080082240A1Active Publication Date: 2008-04-03KOBELCO CONSTR MASCH CO LTD
18 Cites 26 Cited by

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Rotation control device for working machine
  • Rotation control device for working machine
  • Rotation control device for working machine

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0034]FIG. 1 shows an entire configuration of a rotation control device according to the first embodiment.

[0035]Firstly, when drive system is explained, power of an engine 11 is added to a hydraulic pump 13 and a generator motor 14 through a power divider 12.

[0036]A hydraulic circuit 15 is connected to the hydraulic pump 13, and a boom cylinder 6 shown in FIG. 7 and other hydraulic actuators (given the reference numeral 16 in total) are driven by pressure oil from the hydraulic pump 13.

[0037]Power from the generator motor 14 is sent to a rotation motor 19 through both a generator motor inverter 17 and a rotation motor inverter 18. Torque of the rotation motor 19 is transmitted to an upper rotating body 2 through a reduction gear 20, and the upper rotating body 2 is rotated around a vertical axis O shown in FIGS. 7 and 8.

[0038]A battery 21 is provided between both the inverters 17 and 18. The battery 21 is combined with the generator motor 14 and used as a power source for the rotati...

second embodiment

[0055]In the second embodiment shown in FIGS. 4 to 6, the same parts as in the first embodiment are given the same reference numerals and repeated explanation thereof is omitted.

[0056]When different points from the first embodiments are explained, as understood from comparison between FIGS. 1 and 4, rotation acceleration limitation value setting means 36 is provided instead of the rotation torque limitation value setting means 34 of the first embodiment.

[0057]The rotation acceleration limitation value setting means 36 is adapted to determine an acceleration limitation value from a property of boom raising operation amount / torque limitation value which is preset on the basis of the boom raising operation amount, and send the acceleration value to the rotation acceleration and deceleration control means 30, as Control Step S5′ in FIG. 5 instead of Control Step S5 in FIG. 2.

[0058]In the rotation acceleration and deceleration control means 30 receiving the acceleration limitation value,...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

In a rotation control device for rotating a rotation motor at speed in accordance with a boom raising operation amount, at the time of a combined operation for simultaneously performing a rotation action and a boom raising action, a limitation value of rotation torque in accordance with the boom raising operation amount is determined by rotation torque limitation value setting means of a controller, the limitation value serving as a rotation torque limitation value is sent to rotation speed control means, and a command value of the rotation torque is torque-limited by rotation torque limiting means.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a hydraulic / electric combination type rotation control device for a working machine of simultaneously using a hydraulic action by a hydraulic actuator and a rotation action by an electric motor.[0003]2. Description of the Related Art[0004]THE RELATED ART will be described taking an excavator as an example.[0005]The excavator is, as shown in FIGS. 7 and 8, is configured such that an upper rotating body 2 is rotatably mounted on a crawler type lower traveling body 1 around a vertical axis O. On the upper rotating body 2, is installed an excavating attachment A provided with a boom 3, an arm 4, a bucket 5, a boom cylinder 6, an arm cylinder 7, and a bucket cylinder 8.[0006]Instead of a total hydraulic drive method in which all the actions are performed by a hydraulic actuator driven by a hydraulic pump in the excavator, as proposed in WO2006 / 004080A1 (hereinafter, referred to as Patent Docu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
03 Apr 2008
Publication
US20080082240A1
IPC
G06F19/00; E02F9/22
CPC
E02F9/123; E02F9/2075; E02F9/2025
Inventors
KAGOSHIMA, MASAYUKI; KOMIYAMA, MASAYUKI